Tank truck and fluid circulating system



v Nov. 10, 1936. E, BARRETT 2,060,484

TANK T RUCK l XND FLUID CIRCULATING SYSTEM I 7 Filed May 31, 1955 2 Sheets-Sheet 1 INVENTOR. zywdrd 7i Barrfafi ATTURNEYS.

Nov. 10, 1936. E.- R. BARRETT I 2,060,484

TANK TRUCK AND FLUID CIRCULATING SYSTEM Filed May 31, 1935. 2Sheets-Sheet 2 i INVENTOR. Edward /7 342719325 ATTORNEYS.

Pmma Nev. in, 193s UNITED. STATES.

PATENT OFFICE TANK TRUCK AND FLUID CIRCULATING SYSTEM Edward B. Barrett,Detroit, Mich, assignor to Gar Wood Industries, Inc., a corporation ofMichigan Application May 31, 1935,; Serial No. 24,376

8'0laims. (01. 221-67) ploying valves connected to the bottom of thetanks of automobile tank trucks from which the liquid in the tank isconducted by gravity. For the reason that certain flre writers codesrequire the liquid to be removed from the topoi the tanks and also whena greater flow of the liquid is desirable under positive pressure, theherein described pumping system was invented. The

- system meets the code requirements and provides a positive and morerapid flow of liquid from the tank.

In the present system, a pump is driven by the engine of the automobiletank truck through a power take-oi! device connected to the trucktransmission system. Means is employed in con- Junction with the vehicleclutch for connecting and disconnecting the device to the transmissionand the engine controls are utilized for controlling the driving of thepump. The pump cir- 5 culates a liquid through a system embodying afluid motor to drive the motor at a considerably .higher rate of speedthan that at which the pump is driven. This is effected by selecting amotor having a capacity less than that of thepump so that a pressurewill be built up in the fluid which will increase its velocity of flowat the motor, the speed of which is materially increased. -A second pumphaving a greatercapacity than the pumpor motor. first mentioned,

I is driven by the motor at high speed and produces a rapid flow offluid from a tank. A condu'it provided with apressure actuated by-passvalve is disposed about the second pump to permit the flow of fluidtherefrom to be shut ed while the system is in operation, the fluidbeing circulated about the pump. This prevents a pressure from beingbuilt up above a predetermined amount.

This system is supported on the truck with the 5 motor andpump withinthe tank, if a single tank is employed, or within the can-compartment atthe back'of the tank, when a plurality oitanks are employed. In thelatter instance, a plurality of remotely actuated valves are utilizedfor cutso ting in and'out the various compartments to the pump or theexhausting system. The motor and pump are preferably of the gear typeand directly connected. They are supported on a header which-is securedin the wall or the tank,

so whenthemotorandpumparesupportedwithin the tank. The header providesseparate passages .to the motor and pump and forms the means forconnecting the motor and pump to their respective fluid circuits.

Accordingly the main objects of my invention are: to provide anautomobile tank truck with a circulating system which removes the fluidfrom the top of the tank under positive pressure; to provide a tank witha motor-pump system which is supported within the tank ona header whichconnects the separate fluid circuit thereto; to provide a pumping systemon an automobile tank truck having a plurality of compartments withmeansfor connecting each of the compartments separately to the pumpingsystem; to drive the motor of the pumping system by a fluid pump ofgreater capacity than the'motor to thereby produce an increased speed tothe motor and to the pump which it operates; to drive the pump of thesystem from a power take-oi! device connected to the engineof thevehicle, and, in general, to provide a pumping system for a tank whichis aseli-contained unit, which draws the liquid from the top of the tankand which provides a positive and increased flow oi fluid from the tank.

Other objects and features 01' novelty of my invention will be eitherspecifically pointed out or will become apparent when referring, for abetter understanding of my-invention, to the following description takenin conJunction with the accompanying drawings, wherein:

Figure 1 is a view, partly'in section and partly in elevation, of anautomobile tank truck and a pumping system embodying features of myinvention,

Fig. 2 is an enlarged sectional view of the structure illustrated inFig. 1, taken on the line 2-2 thereof,

Fig. 3, is an enlarged sectional view of the structure illustrated inFig. 1, taken on the line 3-3 thereof,

Fig. 4 is a viewoi' structure, similar to that illustrated' in Fig; 1,showing a modifled form thereof, and

Fig. 5 is a diagrammatical view or the fluid pumpingsystem @ustrated inthe foregoing flg- "A closure i2 is mounted on the top of the tank forloading, inspecting and cleaning purposes. A

which an outlet conduit it extends to reach below the normal tankbottom. Within'the tank sump i3 is provided in the bottom of the tank ina motor and pump unit it is supported. The pump is connected to theintake conduit i4 and to a delivery conduit It. A motor 22 for drivingthe pump is connected by a fluid circuit to a driving pump I! which isdriven from a power take-oil device I! connected to the transmission 2|of the truck.

The power take-oil device I9 is of the conventional form, beingconnectible to a gear or the truck transmission and controlled by theusual levers for driving the engine. The clutch oi! the truck isemployed for connecting and disconnecting the truck transmission whenthe power take-oil device is engaged or disengaged from thetransmission.

In Fig. 2, the motor and pump unit I5, disposed within the tank H, isillustrated enlarged. The motor 22 is of smaller capacity than the pump23 and is directly connected in the pump circuit H. The tank H has aheader 24 secured therein. preferably by welding a flange 25 to the tankwall, as at 25. The header forms a support for the motor and pump l5through the connection effected by bolts 21. The header 24 is providedwith independent passageways 4| and 42 of the circuit which areconnected by intake and outlet connecters 29 to the motor 22. In thismanner, the driving fluid is delivered through the pressure side of thecircuit I! to the header 24 into the driven motor 22 and out through thereturn portion of the circuit l1.

In a similar manner, intake and outlet ports II are, provided in theheader 24 independent of the ports of the circuit l1, and are connectedthrough passageways 40 and 42 to the intake and outlet openings of thepump 23. A sealing gasket 23 seals the four passageways above describedbetween the header 24 and the motor and pump unit It. In this manner, afluid is conducted through the system H through the driving motor 22 andreturned to the pump ll which circulates the fluid through the system.The motor 22 drives the pump 22 through a connector 20, which pump 22draws liquid from the tank through the intake conduit l4 and delivers itthrough the delivering conduit It. The tank is emptied under positivepressure from the top rather than as eflected heretofore by gravity fromthe bottom. The rate of flow oi the fluid is materially increased inview of the positive pressure provided by the pump.

The system is illustrated diagrammatically in Fig. 5, wherein the powertake-of! device it is directly connected to the truck transmission 2|through the movement of a lever II when the clutch of the truck isreleased and the transmission gears set to neutral driving position.Under these conditions, the engine power is employed for driving thepumping system through the power take-oil device It. The pump II isconnected in the circulating system I1 and provides a flow of fluidtherein for driving the motor 22 at an increased speed. This is effectedby selecting a motor 22 having a smaller capacity than the pump ll sothat anincrease of pressure and velocity of flow oi the fluid will occurat the motor 22 which will operate at a materially greater speed thanthe pump II;

, A reservoir "may be employed in the system to provide an excess amountor fluid therein. The pump 22, which is directly wnnected to the motor22, is 0! much larger capacity than the motor hand the pump ll. As aresult. a much larger volume of fluid can be pumped by the.

system through the delivery conduit l6 than could be pumped by the pumpl8.

To permit the valve in the delivery conduit It to be closed while thesystem is in operation, a by-pass conduit 31 is shunted about the pump23, across the intake conduit I4 and the delivery conduit IS. A pressureactuated valve 38 is mounted in the by-pass conduit 31 to be actuated bythe pressure which may be built up in the delivery conduit Hi. Thispermits the fluid to flow from the delivery conduit l6 into the intakeconduit l4 and thereby form a circuit about the pump 23 to permit thepump to continue to operate without delivering any fluid or building upa pressure. This safety arrangement prevents a pressure from building upin the delivery conduit it when the valve thereof is closed and the pump23 is operating.

With this particular system, the pump l8 may have only a small capacityand may still effect, through the driving of the motor 22 at high speedto drive the large capacity pump 23, a material flow o1 fluid from theexhaust conduit Hi. This system permits the motor 22 and the pump 23 tobe remotely disposed from the power take-of! l9 and the driving pump l8.

The valve 38 is illustrated enlarged in Fig. 3 disposed in the header 24containing passageways 4| and 42 therein of the circuit II. The header24 is also provided with passageways 40 and 42 communicating with thepump 23 and are cross-connected by the aperture 44 in the wallseparating the passageways. A seat 45 is provided at the mouth of theaperture 44 for receiving the valve 28 which is pressed thereon by aspring 46, the tension of which may be regulated by the adjustment ofthe plug 41. After such adjustment is made, the plug may be retained inposition by the lock nut 48. The passageway 40 is connected to theintake side or the pump, while the passageway 43 is connected to thedischarge side of the pump, that is to say, to the delivery conduit l6.When the pressure is built up in the delivery conduit l6, due to theshutting of! of the valve therein while the system is in operation, thepressure will immedately open the valve 28 to permit the liquid to flowinto the passageway 40 and circulate through the pump, as describedhereinabove,

In Fig. 4, I have illustrated a further application of the pump, that toa tank 5| having a plurality of compartments 52, 52, 54 and 55 therein.A can-compartment 56 is provided at the rear of the tank in theconventional manner and the motor and pump system I5 is supportedtherein and operated in the above described manner.

For connecting the pump to the various compartments, an intake manifold51 is provided,

which is interconnected with a plurality of intake conduits 58, one ofwhich is employed for each of the compartments. Each of the intakeconduits 50 is provided with a valve 59 which may be of the hydraulic,magnetic, spring controlled or 01 the manual type as desired, all ofwhich valves are old and well known in the art. For the purpose ofillustration, spring pressed valves are disclosed. Each valve has an armI which is urged to closed position by a spring 62. A cable 43 isconnected to the arm and is carried over a sheave i4 and connected to alever I which may be pulled downwardly and latched, as on an element 66,for retaining the valve in open position. Each of the valves 59 iscontrolled from the can-compartment Ii of the tank BI and.

in this manner, the liquid in any compartment may be delivered to thedelivery conduit It by preselecting the valve to be opened.

It is also within the purview of my invention to open two or more of thevalves at the same time to provide for the intermixing of the liquidswhen being drawn by the pump from the compartments and delivered throughthe exhaust conduit l6 when such a mixture is desired. The proper amountof each liquid may be obtained by regulating the amount the valves maybe opened. For a heavy liquid, the valve may be opened wide,

while for a light liquid the valve may be only slightly opened to effecta fifty per cent mixture of the two liquids. v

It will be seen from the various arrangements that my particularsystemis unique and very flexible and, while illustrated and describedas, applying directly to an automotivetank vehicle, other applicationsor thesystem will be apparent to one skilled in the art. The use of thefluid pump and motor eliminates any change of sparks occurring, whichwould be hazardous, and the motor-pump unit can be placed directly inthe tank or adjacent to explosive mixtures.

While I have described and illustrated but two embodiments of myinvention, it will be apparent to those skilled in the art that variouschanges, omissions, additions and substitutions may be made thereinwithout departing from the spirit and scope of my invention, as setforth in the accompanying claims.

I claim as my invention:

1. An automotive vehicle truck having a'tank thereon, of a pump andmotor unitsupportecl in said tank, means for conducting liquid to andfrom said motor, means for connecting the pump to the interior andexterior of the tank, a pump exterior of said tank for supplying fluidto said liquid conducting means, and means for driving said exteriorpump from the engine of said truck.

2. An automotivevehicle truck having a tank thereon, of a pump and motorunit supported in said tank, means for conducting liquid to and fromsaid motor, conducting means for connecting the pump to the interior andexterior of said tank, a pump exterior of said tank for supplying fluidto the liquid conduction means of said motor, means for driving saidpump from the engineof said truck, and a by-pass valve in the conductingmeans of the flrst said pump for shunting the liquid about the pump ofthe unit when the pressure of the liquid pumped thereby exceeds apredetermined amount.

3. The combination with an automobile truck having a tank thereon, of aheader on said tank having two liquid conducting circuits therein, amotor and pump operatively connected and supported inside of said tankon said header to have I truck, of a pump, a fluid circuit leading toand from said pump, a conduit by-passing said circuit across said pump,a-pressure valve interconnecting said by-pass circuit to the circuitleading from the pump, a valve on the last said circuit which may beclosed while the pump is in operation to eifect a flow of fluid throughthe bypass conduit, a motor for driving said pump, a

ioldconnected to said pump and extending along said tank, intakeconduits each having a valve therein connected to said manifold, meansin said can-compartment for controlling the position of said valves, anda pump driven by the engine of the vehicle for supplying a fluid to saidmotor.

6. An automotive vehicle having a tank there on divided into a pluralityof compartments, a manifold on said tank interconnectible' throughvalves to said compartments, a motor ahdpump unit, the pump of said unitbeing connected'to the manifold, a delivery conduit connected to saidpump, and a second pump of greater capacity than said motor driven bythe vehicle engine for supplying fluid to said motor, and means forselectively connecting the pump of the unit through the manifold to anyof said compartments.

7. An automotive truck having a tank thereon provided with a pluralityof compartments, a cancompartment disposedin the rear of said tank; amotor and pump unit disposed in said can-compartment, the pump of whichis selectively connectible to said tank compartments from saidcancompartment, and a pump driven by the engine of the truck fordelivering a fluid tosaid motor, said second pump being of greatercapacity than said motor for driving said motor at a high speed.

8. An automotive truck having a tank thereon provided with a pluralityof compartments, 8. can-compartment disposed in the rear of said tank, amotor and pump unit disposed in said can-compartment, the pump of whichis selectively connectible to said tank compartments from saidcan-compartment, a pump driven by the engine of the truck for deliveringa fluid to said motor, said second pump being of greater capacity thansaid motor for driving 'said motor at a high speed, a delivery conductorhaving a valve therein connected to the pump of said motor and pumpunit, and a by-pass conduit extending around said pump of the unit andhaving a valve actuatedby the pressure of the fluid in thedeliveryconduit for by-passing the fluid about the pump of theunit whenthe valve in the delivery conduit is closed.

' EDWARD R. BARRETT.

